Uma proposta de construção e utilização de um sensor de presença simplificado

In this paper, we propose the development and use of an experimental classroom activity that simulates infrared motion sensors, commonly used to control the interior lighting of buildings and, consequently, to save energy. The aim of this experiment is to facilitate and contextualize the understanding of the concepts of 'transmitter' and 'receptor' by using a circuit involving infrared. This activity looks at issues such as the built-in obsolescence of electronic devices in order to raise pupils' awareness of the environmental and social impact of such issues.